Mary, Countess of Blois, also known as Marie of Avesnes, (1200–1241) was countess of Blois from 1230 to 1241.
She was the daughter of Walter of Avesnes and Margaret of Blois.(FR)Henri Platelle, Présence de l'au-delà: une vision médiévale du monde, (Presses Universitaires du Septentrion, 2004), 284.
In 1226, Mary married Hugh I of Châtillon, a count from Châtillon-sur-Marne, son of Gaucher III of Châtillon and Elisabeth of Saint-Pol.Theodore Evergates, The Aristocracy in the County of Champagne, 1100-1300, (University of Pennsylvania Press, 2007), 223. They had five children: John I (died 1280), Count of BloisTheodore Evergates, The Aristocracy in the County of Champagne, 1100-1300, 254. Guy II (died 1289), Count of Saint Pol Gaucher (died 1261), lord of Crécy and Crèvecœur Hugh (died 1255) Basile (died 1280), became Abbess of Notre Dame du Val in 1248.
Her eldest son, John, succeeded her in Blois.
References
External links Counts of Blois